Remove some duplicate code in quic tests.

net/quic/test_tools/quic_test_utils.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/test_tools/quic_test_utils.h"
 
 #include "base/stl_util.h"
+#include "base/strings/string_number_conversions.h"
 #include "net/quic/crypto/crypto_framer.h"
 #include "net/quic/crypto/crypto_handshake.h"
 #include "net/quic/crypto/crypto_utils.h"
 #include "net/quic/crypto/null_encrypter.h"
 #include "net/quic/crypto/quic_decrypter.h"
 #include "net/quic/crypto/quic_encrypter.h"
 #include "net/quic/quic_framer.h"
 #include "net/quic/quic_packet_creator.h"
 #include "net/quic/test_tools/quic_connection_peer.h"
 #include "net/spdy/spdy_frame_builder.h"
@@ skipping 361 matching lines @@
   if (identical) return;
   ADD_FAILURE()
       << "Description:\n"
       << description
       << "\n\nExpected:\n"
       << HexDumpWithMarks(expected, expected_len, marks.get(), max_len)
       << "\nActual:\n"
       << HexDumpWithMarks(actual, actual_len, marks.get(), max_len);
 }
 
+bool DecodeHexString(const base::StringPiece& hex, std::string* bytes) {
+  bytes->clear();
+  if (hex.empty())
+    return true;
+  std::vector<uint8> v;
+  if (!base::HexStringToBytes(hex.as_string(), &v))
+    return false;
+  if (!v.empty())
+    bytes->assign(reinterpret_cast<const char*>(&v[0]), v.size());
+  return true;
+}
+
 static QuicPacket* ConstructPacketFromHandshakeMessage(
     QuicGuid guid,
     const CryptoHandshakeMessage& message,
     bool should_include_version) {
   CryptoFramer crypto_framer;
   scoped_ptr<QuicData> data(crypto_framer.ConstructHandshakeMessage(message));
   QuicFramer quic_framer(QuicSupportedVersions(), QuicTime::Zero(), false);
 
   QuicPacketHeader header;
   header.public_header.guid = guid;
@@ skipping 76 matching lines @@
   data.AppendToString(&data_);
   return true;
 }
 
 void TestDecompressorVisitor::OnDecompressionError() {
   error_ = true;
 }
 
 }  // namespace test
 }  // namespace net